Screw punch



W. A. WHITNEY.

SCREW PUNCH.

APPLICATION FILED FEB. I2, 1920.

l,4@3,366. Patented Jan. 10?, 1922.

1, 2 SHEETSr-SHEET I.

W. A. WHITNEY.-

SCBEW PUNCH.

APPLICATION FILED FEB. 12. 1920.

Patented. Jan. 110, 1922.

srnres WILLIAM A. WHITNEY, 'o'r' nocnronn,irnrnors.

scnnw Pnivon.

Application filed February 12,1920. serial No. 358,100.

1 all w ir-41cm. it may concern:

Be it known that I, Wrnmnrr A. VVrn'rNuY, "zen of the United f-ltates, residing at rord, in the county of llinnebago and of Illinois. have invented a new and Screw Punch. of which the following suecii'cation.

nvention relates to the class of metal tools and more particularly to an ball bearing screw punch for holes in sheet metal or the like of clznesses and by niians of which mum degree of pressure can be obwith a minimum exertion of power.

a o an object of the invention to progrovcd screw punch in the form a portable type having a head or p with a. handle so as to be ui ntlv on the .vorl: and which meted as to withstand greatpres-- the punch is operated to produce '0 in thc n'iaterial.

I further object of the i vcntion is provided with anovel form or hit or pointperinitting renewal oi without requiring renewal of the or shank portion thereof, and

" e be h will permit the bit to be renewed with s object of the invention is roved actuating means for screw which will serve to support :3 ,Lkl 35 the bit in an adjusted position aga nst'its i end ncv to move downwardly by its ball bearing mounting and convenient reversal of bit so as advance or c 116 61011 being such as to irr tion to be quickly effected. J ng and other objects in an the description on resides in the combicnt oi partsa d in the n hercii l ter described being understood that .oe embodiment of the solosed may be made scope of what is claimed without red"- the spirit of the invention. ying drawings Figure 2 is a plan view, partly in section.

F igure 3 is a horizontal sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a side elevation of the standard or shank of the punch.

Figure 5 is a detail -fragmentary horizontal sectional, view taken on the line 55 of Figure 4.

Figure 6 is a detailed horizontal sectional view of'the drill taken on the line 66 of Figure 4, and

Figure 7 is a vertical sectionalfview taken on the line 77 of Figure 2.

Referring to the drawings in'detail, the numeral 10 designates .the body of the punch which is semi-circular in outline, looking at the side thereof, the edge portion 11 being relatively narrow while the body is extended at opposite sides adjacent to the axis thereof as shown at 12 in order to provide a thickened portion horizontally and transversely across which there is provided a recess or slot 13 providing upper and lower jaws 14 and 15. Horizontally through the body in alinement with the recess is an opening 16 having bosses 17 upon opposite sides thereof at the edge portion 11 and extending radially to the thickened portion 12' so as to reentorce the edge'portion at the opening 16, where the lower end. of the'handle 18 is turned inwardly and engaged in said opening there to be held by a set screw 19 engaged through the threaded aperture in one or said bosses and contacting with said handle end. The handle extends man are at a spaced distance'and substantially concentric to the edge of the body in an upward direction the free end thereof being brought into contact with said edge where it is further limited against movement so as to bear the necessary strain to permit the device to be transported to the place of use.

Adjacent to the upper extremity of the handle is a cylindrical enlargement 20 which forms a shoulder for contact by the free end of said handle, said enlargement being provided with successively reduced portions 2L and 22 and a threaded extremity 23. lhe reduced portion 21 is'designed to receive a pinion 24 which 'is received between the spaced jaws 25 of the socket portion or" a ratchet lever 26, there being mounted between the jaws 25 at the crotch of'the slot thus formed, a' double ended pawl 27 having projecting ends thereon parallel to its pivot tom of the counterbore 30 while mounted between the opposite end of the spring and the end wall of the counterbore of the bolt 31 is a ball bearing 33 which permits free turninn oi the bolt an d serves to take up wear. it will also be seen that since the pawl 27 is designed to rock on the pivot 28, the projection 29 will engage the oppositely beveled end or faces of the bolt 31 so as to depress the latter after which said projection will ride over the bolt and the bolt will then be projected by its spring; to retain the pawl at either side in abutment with the end as well as the ball bearing 33 between the jaws 2?. It should be noted that one of the jaws 25 has its free end cut concentric with an opening 3% therethrough as shown at 35, the other jaw being extended and providing a larger smooth-bored or unthreaded opening 36, the opening 34. being smooth-bored also. The pinion 9A. is provided with circular projection 37 at the bottom thereof adapted to engage an opening 38 in the detent ineniber 47 mounted on the reduced portion 22, said comprising a plate 39 in the form o'i a washer having a projection 40 at one side thereof which is formed or stamped with a laterally projecting finger piece or handle 41. Projecting upwardly -from the projection 40 of the plate 39 are a pair of detents or lugs 42 having the major portions thereof opposing each other and provided with a circular contour as shown at their outer portions beveled or flattened as shown at 44- tor a purpose to be hereinafter more fully specified. "lhe top of the pinion 914i eonnten bored and internally threaded shown at 45 thereby providing an outwardly .i cin o; shoulder 46 which is engaged by the inner end of an externally threaded plug; or net nut having: a ci'rcuniscribingg re or en ternally threaded inner end for this purpose and an outer wrench engaging portion while the bore is smooth to freely turn onthe re duced portion 29W A tap 43 is mounted on the threaded end 23 so as toretaiu the parts .1 body portion 49 7. re eive the said sleeve i' U'QHGS tie {rear is 1 tion so that the ball bearings 53 engaged therein will contact by the plurality of points on the peripheries oi the hall instead of throughout the surfacial area thereof so as to reduce friction and wear on the parts. The spiral groove 52 is formed in rill or shank 5d whichis further provi-f d with a vertical axial passage communicating with said groove throir 1 the medium of radial passage 56 exten 'ng radially from the groove to the p s 3e 55 at the upper end and downwardly sloping}: radial passage 57 at the lower portion of said drill or shank so that the drill is mounted to freely turn and will be descended of its own weight were itnot held by the actuating mechanism partly described and to be hereinafter "further set forth. It will also be apparent that as the drill isted downwardly the ball hearings will be caused to circulate upwardly in the axial passage and downw rdly inthe spiral race way, while circulation will take place in the opposite direction when the drill being raised. In order to deflect the balls into the race into the radial passages and consequently into the axle passage deflectors 58 are provid .d facing; said spiral grooves or race ways at the outer end of each radial passage and the upper end of: the drill provided with a hexagonal or other'polygonal cross section 59 above which the shanlr is threaded and reduced. as shown at to receive flanged nut 61.

therein as shown at 62. the upper end the sleeve being provided with diametrically disposed recesses 63 by which it may turn home or be removed; There is mounted on the p ojecting portion of the sleeve a span-- ner r1. t l beneath which is received a ring 65, the rings having; co-actingbeveled portions 66 and a paclqin g or washer 6? be inp: disposedv between the upper edge ot the sleeve to the ring 65. Mounted on the heraaggonal portion 59 which is of reduced size relatively to the threaded portion oi the rill or shank is a spur near (33 having a pro ectie-n 6;) raisin against the i inner rino' iccomniodat eenea I ilate hereto )1'6 descrihcth while the i rnd Oil the in; jaw oi the actuating .1. overlies the peripheral portion oil the s eer which is ais; formed with a pwjection 70 for this purpose i 1 understood that novn th an opeuimr o! a cross section coi esponding to that olthe shank at the portion 1 in order to cause the to rotate the she when driven. For this purpose, the lever is actuated and. while heir-3 oscillated the detents or legs alte nately enaagz e the teeth the gear and resist the tendency oi. the parts to rotate in an opposite direction. he double ended pawl will serve to reverse the direction of will operation by e .gagcment with the intervening notches of the pinion, so that the drill can be advanced or retracted. In addition, there is engaged or provided for ngagcment on the nut l? at its wrench engaging portion, a socketed wrench or crank handle '71 which may be employed for reversing the o eration by throwing the pawls and detent out of operation, thus obviating the necessity for oscillating the operation lever in order to reverse the position of the parts after a sheet of metal or material has been punched.

The lower end of the sleeve 50 terminates short of the lower end of the cylindrical portion, being disposed to engage an upwardly facing shoulder 72, the front portion of the cylindrical portion being recessed as shown at 73 and provided with engaging lugs 74 at either side thereof projecting downwardly for contact with the upper ends of a sheet of metal to be punched. It is to be understood that the metal is received between said lugs over the lower jaw of the device and held in position during the punching operation by the pressure exerted during said operation by a bit or point 7 5. In the preferred construction, the lower end of the shank or punch is provided with a counterbore or socket '76 for receiving said bit, the latter being made detachable so that it can be renewed economically without the necessity of renewing the entire shanl For this purpose the bit is notched at its upper portion and provided with an external or circumscribing groove '27 adapted to aline tangential grooves 78 forming key ways for receiving the leg portions of the substantially U shaped key 7 9, the bight portion 80 of which is seated in a recess 81 in the periphery of the shank or drill, or drill-head or stock so as to permit the latter to move into the shell while at the same time retaining the bit or point against displacement.

immediately below the cylindrical portion 49 the lower jaw of the body is provided with a vertical aperture 82 through which the stampings are forced and co-acting with the drill bit is an annular platen 83 which seats in a counterbore Set in the upperportion of the lower jaw concentric to said aperture. This platen is provided with a circumscribing arcuate' groove 85 and mounted at the inner wall of the counterbore in a recess 86 is a spring pressed ball 87 which snaps into said groove and retains the platen in position while permitting it to turn. A. spring 88 will give to permit this, thereby permitting the platen to be applied or ren'ioved with facility, thereby permitting conve iient renewal when desired or neces sary, as well as obviating the objection to the use of a set screw, heretofore of common use. Thus, when the bit is brought into forced engagement with the material to be punched oscillation of the operatinglever will steadily force it from the material during such action under pressure and the ball hearings will take up undue friction and prevent injury to the parts. The function cleavage will also take place by reason of the co-action and bit and the sharpened or shouldered upper edge of the platen as is clearly shown in the drawings.

In order to cause automatic shifting of the detents, the plate thereof is provided'with a depending lug 89, the lower edge thereof being oppositely beveled and designed to engage a correspondingly formed upper end of the spring pressed dog mounted in the top of the casting or body and adapted to be depressed as the lug rides over the same during' the oscillation of the operating lever or upon actuation of the plate through the medium of its linger-piece in order to reverse the direction of operation so that the drill may be moved to operative or inoperative position as desired.

The lower end of the axial passage, which latter is forced out from the bottom, is closed by a plug 55. Also by shifting the double pawl, 27, the lever may be oscillated to lo tate the pinion in opposite directions, and the plate 39 may be secured by the fingerpiece ll to callse'tl'le detents 42 to act atopposite'sides of the gear 68 to prevent reverse rotation thereof under pressure or otherwise. (if course, the dog 90 will permit automatic disengagement of the detents 42 at either side from between or behind the teeth of the gear, free of the same and the pinion, as the lever is actuated or oscillated, while coacting with the lug 89 at their inclined or beveled sides as shown in Figure 7 of the drawlugs to retain the operative detent 42 in en ged position, while the other detent is out ot engagement with the gear. The device will permit great pressure with ease and thick plates of metal may be punched quickly and with facility. Having thus described the invention what 1s claimed is:-

1. A portable screw punch comprising a flat body adapted to be disposed on edge. a handle on the edge portion of the body near the top thereof, said body being recessed to provide upper and lower jaws, the lower jaw being provided with a vertical aperture and the upper jaw being formed with a cylindrical portion of "er diameter than said aperture, and tog vertb cally therewith, the lower jaw having a counterbore around the aperture, a ring-like platen mounted therein and provided with a circumscribing groove, a spring pressed ball mounted in the wall of the counterhore and detachably engaging said groove, a sleeve mounted in the cylindrical portion, said sleeve being provided with an internal spiral groove, a punch bit having a standard provided with a similar external groove and an axial passage communicating with the upper and lower ends of said groove, ball bearings in said grooves and adapted to circulate through said passage upon rotation of the standard in either direction. to raise or lower the bit, and means for rotating said standard.

2. A portable screw punch comprising a flat body adapted to be disposed on edge, a handle on the edge portion of the body near the top thereof, said body being recessed, to provide upper and lower aws, the-lower jaw being provided with a vertical aperture and the upper jaw being formed with an enlarged portion of larger diameter than said aperture and alining vertically therewith, the lower jaw having a counterbore around the aperture, a ring-like platen mounted therein and provided with a eir-- cumscribing groove, a spring pressed ball mounted in the wall of the counterbore and detachably engaging said groove, a sleeve mounted in the enlarged portion, said sleeve being provided with an internal spiral groove, a drill bit having a standard provided with a similar external groove and an axial passage communicating with the upper and lower ends of said groove, ball bearings in said grooves adapted to circulate through said passage upon rotation of the standard in either direction to raise or lower the bit, a gear mounted on said standard, a pinion rotatably supported by the "body in mesh with said gear, a ratchet lever associated with said pinion for stepping the same in opposite directions, and means for reversing said ratchet mechanism.

3. The combination with a body having upper and lower jaws, the lower jaw being provided with an aperture an annular platen mounted therein and provided with an internal cutting edge, a portion above said aperture having a recess in the front thereof and spaced depending-lugs at either side of said recess, and a punch bit cooperating with said platen and movably mounted in said shell.

l. The combination with a body having upper and lower jaws, the lower aw being provided with an aperture, an annular platen mounted thereinand provided with an internal cutting edge, an enlarged portion above said aperture, a spindle mounted for spiral movement in the enlarged portion, means to depress or retract the same, said spindle having a bit at its lower end cooperating with said platen, a gear mounted on the upper end of the spindle, a pinion rotatably supported in mesh with the gear, an actuating lever straddling the pinion, a

vdouble ended spring pressed pawl carried by thelever and engaging the pinion at either side, and means for reversing the actuating direction of the lever.

5. The combination with a body havlng 1 ,eoaeee ing a bit at its lower end cooperating with said platen, a gear mounted on the upper end of the spindle, a pinion rotatably supported in mesh with the gear, an actuating lever straddling the pinion, a double ended spring pressed pawl carried by the lever and engaging the pinion at either side, a plate pivoted on the axis of the lever and having spaced detents co-aeting with the gear to retard the movement thereof in either direction. and means for shifting said plate.

6. The combination with a body having upper and lower jaws, the lower jaw being provided with an aperture, an annular platen mounted therein and provided with an internal cuttin ed e an enlar ed or- D b 7 t) tion above said aperture, a spindle mounted for spiral movement in the enlarged portion to depress or retract the same, said spindle having a bit at its lower end cooperating with said platen, a gear mounted on the upper end of the spindle, a pinion rotatably supported in mesh with the gear, an actuating lever straddling the pinion, a double ended spring pressed pawl carried by the lever and engaging the pinion at either side, a plate pivoted on the axis of the lever and having spaced detents and co-acting with the gear toretard the movement thereof in either direction, a linger-piece on the plate, a lug depending from the plate intermediately of said detents and oppositely beveled, and an oppositely beveled spring pressed dog cooperating with said lug to automatically shift said plate upon oscillation of the lever to temporarily retain the same in shifted position.

7. The combination with a support having spaced jaws one of which is formed with an aperture and the other being counterbored, a sleeve adjustably retained in said counterbored aw against rotation and provided with an internal spiral groove, a tool standard having an external spiral groove, an axial. passage and oppositely inclined radial passages connecting the axial passage with the upperand lower ends of the spiral groove of the standard, said grooves of the standard and sleeve -co-acting to form a raceway and being of polygonal cross section, a continuous line oi balls adapted to circulate in said race-way and passages, and means for turning said standard to raise or lower the same.

8. In a punch, a. body portion, a bearing sleeve therein provided with an internal spiral groove, a tool spindle spirally movable therein and having a coacting external spiral groove, said spindle having an axial passage and oppositely inclined radial passages connecting with the axial passage with the upper and lower ends of the spiral groove oi? the spindle, and means for actuating said spindle.

9. The combination with a jaw; of a sleeve ed therein and provided with an inspiral groove, a spindle having an :"tei'nil spiral groove cooperating with the groove of the sleeve, said spindle having a longitudinal passage and radial passages communicating with the raceway formed by the coacting grooves, and balls circulating in said raceway and passages.

10. In a punch, a body portion, a bearing sleeve therein provided with an internal spiral groove, a tool spindle spirally movable therein and having a coacting external spiral groove, said spindle having an axial passage and oppositely inclined radial passages con- "ecting with the axial passage with the upier and lower ends of the spiral groove and the spindle, a continuous line of balls adapted to circulate in said race-way and passage and a plug closing said axial passage.

11. The combination with a sleeve provided with an internal spiral groove; of a working spindle having an external groove cooperating therewith, an axial passage and radial passages in the upper and lower ends communicating with said grooves, the upper pas age extending upwardly and outwardly and the lower passage extending do'wnwardly and outwardly, a continuous line of balls circulating in said grooves and passages, and means for obtaining an access to said passages to apply or remove the balls.

In testimony that I claim the foregoing as my own, I have hereto afl'ixed my signa ture in the presence of two witnesses.

WILLIAM A. WHITNEY. Witnesses H. A. MERLIEN, F. V. BoeAn'r. 

